class AirConditioner:
    __price = 0.0
    __brand = ''

    def get_price(self):
        return self.__price

    def set_price(self, price):
        self.__price = price

    def get_brand(self):
        return self.__brand

    def set_brand(self, brand):
        self.__brand = brand

    def power_on(self):
        print('空调开机了...')

    def timed_shutdown(self, minute):
        print('空调将在', minute, '分钟后自动关闭...')